1200012100122 has 128 divisors (see below), whose sum is σ = 2802656526336. Its totient is φ = 338499200000.

The previous prime is 1200012100109. The next prime is 1200012100247. The reversal of 1200012100122 is 2210012100021.

It is a junction number, because it is equal to n+sod(n) for n = 1200012100098 and 1200012100107.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116829847 + ... + 116840117.

It is an arithmetic number, because the mean of its divisors is an integer number (21895754112).

Almost surely, 2^{1200012100122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200012100122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401328263168).

1200012100122 is an abundant number, since it is smaller than the sum of its proper divisors (1602644426214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200012100122 is a wasteful number, since it uses less digits than its factorization.

1200012100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11436.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200012100122 its reverse (2210012100021), we get a palindrome (3410024200143).

The spelling of 1200012100122 in words is "one trillion, two hundred billion, twelve million, one hundred thousand, one hundred twenty-two".